Chapter 7, Problem 54P

Show how each of the following transformations might be best accomplished. More than one step may required. Show all reagents and all intermediate structures. [4 only] CH3 A. CH CH2 C Br CH3 CH3 CH3CH2 C NH2 CH3 B OH any source of carbon N MIH

Consider the reaction below to answer the following questions. 0 0 25 PS ES 1919sds-III msx H H + 5% NaOCH 3, CH3OHA O CH₂OH Jeiniog 2E1 gniwool of mor]. Ignibuloni 9vil 19 A B 11 >buoqm gniwollol so dass 101 tomboy boo-11Coble or to r ton auch i viw ninlaxs, noitsausbroo 152 lobla ogsbau ton 250b br A. Which carbonyl compound functions as the electrophile in this reaction? B. Draw the structure of the enolate ion that is generated during the course of this reaction. C. This reaction is an example of: a. a mixed Claisen condensation. b. C. d. a Dieckman condensation. a Michael reaction. a mixed aldol reaction. HD HD

Consider the reaction below to answer the following questions: 847 Acetoacetic ester can be prepared by the Claisen self-condensation reaction of ethyl acetate. H₁C 0 H 0 IL 유 || OCH2CH3 1. NaOEt, EtOH C 2. H₂O H3C CH₂ Cold not tobizmo. S OCH2CH3 A. Write the complete stepwise mechanism for this reaction. Show all electron flow with arrows and draw all intermediate structures. B. Ethyl acetate can be prepared from ethanol as the only organic starting material. Show all reagents and structures for all intermediates in this preparation. C. Give the structures of the ester precursors for the following Claisen condensation product and formulate the reaction. ou OEL